Device on flat knitting machines for producing goods patterned by reenforcement



July 19, 1932.

DEVICE ON FLAT KNITTING MACHINES FOR PRODUCING P. LlEBERKl NECHT1,867,704

GOODS PATTERNED BY REENFORCEMENT Filed Oct. 29, 1930 2 'E i I n K3. /77/r45 n IS I I I l T. [:1 H Ii: W g l n m u u:

H E r m l H i 5 i V Z l c o o a OX5 i c a 46 a c 0 o a a I c e e 6 I Id, d, 2

, W MW Patented July 19, 1932 UNITED STATES PATENT OFFICE PAULLIEBERKNECH T, OF EINSIEDEL, NEAR CHEMNITZ, GERMANY, ASSIGNOR OF ONEHkLF TO MASCHINENFAIBRIK-EINSIEDEL, GESELLSCHAFT MIT SCHRAINK'IER HA1-TUNG, F EINSIEDEL, NEAR CHEMNITZ, GERMANY DEVICE ON FLAT KNITTINGMACHINES FOR rnonucme GOODS ra'rrnnnnn 'BY nnnnroncnnnnr Applicationfiled October 29, 1930, S eria1 No.491,899, and in Germany May 16, 1930.

At present the manner in which the production on flat knitting machinesof goods patterned by reenforcement takes place is that the guide of thereenforcing thread abuts 6 during knitting against the pins mounted on arotary but otherwise stationary drum. The length of this guide pathprelimited by one of these pins corresponds with the length of thereenforcing rowof stitches produced in 10 the goods.- Owing to thedifi'erent lengths of the pins, the reenforcement stitch rows mayi bemade any length so that any pattern is produced. By this patterningdevice however patterning can take place only in the width of the goodswhich lies between the longest and shortest of the pattern pins whichare variable only in a vertical direction. Therefore the possible numberof patterns is limited. This'limited range of patterns is howeveronlypossible when, in accordance with the also known patterning device forreenforcement patterns, such stops are. employed for the thread guiderods as are rotatably mounted on a screw-threaded spindle and are formedas nuts and are movable in a lateral direction. I

The object of this invention is to increase the number of possiblepatterns whilst employing the hereinbefore mentioned and 80 knownpattern pins.

' According to theinvention, a disc carrying the pattern'pins androtatable with the same is mounted to be movable in a lateral direction.Thereby the pattern pins can let the reenforcement thread guide act onthe goods at any desired place. By the aid of this improvement hithertoimpossible reenforcement patterns can be formed.

For example it is possible to produce a three-part reenforcement patternin such a way that its first part is composed of two right angledtriangles, its second part is com-- posed of two obtuse angled trianglesextending towards each other, and its third-part is composed oftriangles of the first named kind, whereby the perpendicularly runninglines of the last named pattern part extend in contrary direction tothose of the triangles of the first part; A pattern of this kind isimpossible to produce with the pinless but slidable stop, because thedisplacement of the stop for the stated pattern is twice as great as atthe other side of the pattern and therefore several spindles withdiflerent lifts would be necessary. Even then one would be limited tothe production of the one pattern. Even with a rotatable but otherwisestationary pattern drum, the pattern possible with the device accordingto the present invention could be obtained only if the pattern drum weremade of exceptionally large size which excludes the use of such drums inpractice.

Naturally the device suitable for carrying out this new idea can takevery difierent t forms. According to the invention, rotatable discs areparticularly suitable therefor which are fitted with pattern pins andare arranged on a spindle which is parallel to the movement o'fthethread guide, the discs being displaced in a lateral directiontogetherwith all ofthe similarly arranged pattern drums, by turning the spindle.In place of such patterh discs, pattern discs without pattern pins canbe employed, the small surface of which serves as a stop, these discsturning in the long direction of the machine and having their axesarranged displaceable in the same direction. a In the accompanyingdrawing a drum fitted with pattern pins to produce the hereinbeforestated pattern is illustrated as a constructional example.

Figure 1 shows in plan the hereinbefore mentioned patterning device fora cotton machine.

Figure 2 shows in end view a feed device for the pattern drum shown inFigure 1.

Figure 3 shows the new reenforcement pattern produced by the showndevice.

Figure 4 is a fregmentary plan view and illustrates a constructionmodification.

Referring to Figs. 1 and 2 of the drawing, the housing a or (1 serves inknown manner also as a bearing for the drums e which flank them at bothsides and are provided with pins for the stops 0 of .the reenforcementthread guides (1, cl. The drums e arefrotated intermittently by aratchet pawl g actuated 4 'from a cam f and thereby always bring an- 1other of the pins 6 into the paths of the thread guide stops 0. Thehousing a has two eyes it and these hang on a smooth rod-2'. This rodand a screw-threaded spindle m which is parallel with the thread guiderods k are mounted in stationary brackets n, the spindle m beingturnable therein. The spindle m has a periodically movable wheel o andhas aright hand thread in the vicinity of the left hand housing a and aleft hand thread in the vicinity of the right hand housing a. Therotation of the spindle m produced by rotation of the wheel 0 effects adisplacement of the housing nuts a, a parallel to the movement of thethread guides d, d and inwards or outwards.

In order to produce the reenforcement pattern shown in Figure 3 andreferred to in the earlier part of this specification, one proceeds asfollows :A change in the width p of the reenforcement pattern composedof the three parts 1, 1', 2, 2' and 3, 3 takes place only after fourrows. Furthermore two of the pattern drums e, e fitted with pattern pins6 belong to this pattern formation. On forming the first pattern part 1,1, in the first four rows, the stops 0 of the thread guide rods is abutagainst the pattern pins 1) provided at the right and left of thepattern drums e, 6. After the fourth row of stitches is ended and beforethe commencement of the fifth row, a

turning of the pattern drums e, e takes place to such an extent that thesucceeding pins arrive in the path of the-stops 0. Whilst the h righthand pin 6 of the left hand drum 6 and the left hand pin 6 of the righthand drum e, which are used only, are maintained two stitch widthslarger in accordance with the second notch 4, and thereby the stops 0abutting against them describe a path which is two stitch widthsshorter, the left hand pin bf of the left hand drum e and the right handpin Z)" of the right hand drum e now coming into action are exactly thesame size as those pins 6 of both drums which were previously in action.Up to the notch 16 the I intermittent rotation of the pair of patterndrums e, e continues. whereby the pins b coming successively into actionincrease in steps whilst the pins I)", retain always the same length asthe first the outer edges of the first part 1, 1 of this pattern have toextend slantingly inwards, Whilst the inner edges of the said part eachforms a perpendicularly extending line 9.

The right-angled triangles: 1, 1 thus created could be formed with theaid of a pattern drum which rotates only and is not displaced axially.The axial displacement however is necessary when the obtuse-angledtriangles of the second part 2, g of the attern have to be created.For'this purpose pins 6, b, b" are employed arranged the same as for theformation of'the part 1, '1'. In addition when the drums e, e are turnedthey are simultaneouspin 6. Accordingly I ly displaced towards eachother to the extent of two stitch widths. Consequently the stops c whichare limited movement by the successively acting and successively longerpins 6 have paths which are reduced on the outer side by 4 stitch widthsand are increased on the inner side by 2 stitch widths after each fourthrow of stitches, assuming that the difference in length between thewedge-like rising pins 6 corresponds with two needle divisions.

The second part 2, 2' of the pattern ends on the formation ofthe 128throw of stitches. The following part 3, 3 of the pattern is also effectedby turning the pattern drums e, e andmovement of the same in thelongitudinal direction of the machine. This longitudinal movementhowever takes place in directions away from eachother, and thereforeoutwards.

In the construction shown in Figure 4,

the right hand pattern disc e hasa small or narrow, side surface 6 whichis substituted for the'pins b of the right hand disc e of- Figure 1 andwhich serves as the abutment for the right hand stop 0. The surface I)is stepped and therefore is capable'of exercising the same effect as thepins of varied lengths.

I claim 1. In a device on flat knitting machines for the production ofgoods patterned by reenforcement by means of pattern drums each avingseveral stops for the reenforcement thread guides, means for rotatingthe pattern drums'in combination with means for moving the pattern drumslongitudinally of the machine and causing the drums to act on thereenforcement thread guides at any place along the arrangement of theneedles of the machine.

2. In a device according to claim 1, wherein the pattern drums furnishedwith pattern pins are provided on a spindle which is parallel to themovement of the reenforcement thread guides and when rotated causes allsimilarly furnished drums to move in lateral direction.

- 3. In a device according to claim 1, wherein the narrow surfaces ofthe drums serve as stops and the drums rotate in the longitudinaldirection of the machine whilst the axes of the drums are displacable inthe said longitudinal direction.

In testimony whereof, I, have signed my name to this specification atresden, Germany this 16th d'a of October 1930.

PA LIEBERKNECHT.

in their longitudinal

